Siemens / ITE CN3B800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE CN3B800 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed for heavy power distribution, the Siemens CN3B800 is a 3-pole, 800A molded case breaker. It integrates a Cordon Fuse Pac to achieve a 100kA interrupting rating at 480VAC. This bolt-on unit mounts into Siemens P4 and P5 panelboards, SB switchboards, and legacy ITE CDP panels. It serves as an exact replacement for aging infrastructure, superseded by the CMD63B800. Equipped with fixed thermal-magnetic trip units, this fused breaker delivers reliable long-time and instantaneous protection.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | CN3B800-R |
| Series | CN |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P4, P5 Panelboards, SB Switchboards, ITE CDP Panelboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused, Interchangeable Trip Unit |
Product FAQs
6 answersIs the Siemens CN3B800 still manufactured, or is there a direct replacement?
The CN3B800 is a legacy ITE and Siemens breaker that is no longer in active production. It has been superseded by the Sentron Series CMD63B800, which is a fuseless, current-limiting breaker that provides the same 800A rating and 100kA interrupting capacity at 480VAC.
Which panelboards and switchboards are compatible with the CN3B800 circuit breaker?
This bolt-on breaker is designed for installation in Siemens P4 and P5 panelboards, SB switchboards, and legacy ITE CDP panelboards.
How does the CN3B800 achieve its 100kA interrupting capacity at 480V?
The CN3B800 integrates a Cordon Fuse Pac. This fused design allows the breaker to safely interrupt high fault currents up to 100kA at 480VAC, providing robust protection for heavy power distribution systems.
What type of trip unit is installed in the CN3B800?
It features a fixed thermal-magnetic trip unit that provides both long-time and instantaneous overcurrent protection. The thermal and magnetic trip settings are fixed and cannot be adjusted in the field.
Can the CN3B800 be used in a 600V system?
Yes, the CN3B800 has a maximum voltage rating of 600VAC. However, its interrupting capacity will be lower at 600V compared to its 100kA rating at 480VAC. Always verify the available fault current at 600V before installation.
Does the CN3B800 mount onto a standard DIN rail?
No, the CN3B800 is a large C-Frame molded case circuit breaker that requires a bolt-on mounting configuration directly to the busbar of compatible panelboards or switchboards.
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Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
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